diff options
| author | Samuel Holland <samuel.holland@sifive.com> | 2024-10-26 10:13:54 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2025-03-26 15:56:40 -0700 |
| commit | 2c0391b29b27f315c1b4c29ffde66f50b29fab99 (patch) | |
| tree | 5495a849828fb02f632bcbe9c0ca88741228c6bb /arch/riscv/include/asm/pgtable.h | |
| parent | bffada8201fc9933ba0974b76b6068d6b4557ef4 (diff) | |
riscv: Allow NOMMU kernels to access all of RAM
NOMMU kernels currently cannot access memory below the kernel link
address. Remove this restriction by setting PAGE_OFFSET to the actual
start of RAM, as determined from the devicetree. The kernel link address
must be a constant, so keep using CONFIG_PAGE_OFFSET for that purpose.
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Jesse Taube <mr.bossman075@gmail.com>
Link: https://lore.kernel.org/r/20241026171441.3047904-3-samuel.holland@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include/asm/pgtable.h')
| -rw-r--r-- | arch/riscv/include/asm/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 050fdc49b5ad..eb7b25ef556e 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -12,7 +12,7 @@ #include <asm/pgtable-bits.h> #ifndef CONFIG_MMU -#define KERNEL_LINK_ADDR PAGE_OFFSET +#define KERNEL_LINK_ADDR _AC(CONFIG_PAGE_OFFSET, UL) #define KERN_VIRT_SIZE (UL(-1)) #else |